INDEX 



[The black-faced numbers indicate specific headings.] 



A. Page. 



Abbott, C. C 15 



Abundance 190 



Aclsnow 1 edgm ents 7 



Adams, C. 0--_ 2, 7, 187, 189, 190, 191, 193 

 Affinities (.see also Description of 



eacli form) 2, 6. 33, 34, 37, 189 



Allen, .1. A 188, 193 



Anal plate 8, 9 



Angustirostris 9, 25, 35, 38, 40, 



43, 120, 125, 127. 137, 146, 157, 158, 189 



Atkln.son, D. A 112 



Atomarchus 9, 120 



Atrata 90, 138, 147, 148, 156 



Aurata 158, 164 



B. 



Bailey, V 99, 100, 160, 162 



Baird, S. F 1 



Baird, S. F., and Girard, C 8, 35, 



58, 66, 70, 145, 147, 176 



Baker, F. C 45 



Baronis-miilleri 124 



Bibliography 195 



Biscutata 138, 139, 144, 147. 148, 155 



Bocourt 7. 132, 165 



Boulenger, G. A__ 5, 100, 128, 161, 162, 165 



Brachystoma 5, 89, 93, 94, 96 



Branson, E. B 75, 100, 141 



Bray, W. L 61,99 



Breeding season 13 



Brood. (.See Productiveness.) 



Brous, H 71 



Brown, X. E 1. 5, 8, 35, .SO, 54, 



58, 61, 86. 88, 92, 144, 149, 1.56, 186, 190 



Brunnea 138, 145 



Bumpus, H. C 8 



Butleri 4,5, 9, 11, 



14, 17, 20, 27, 28, 31, 35, .37, 38, 40, 43, 

 44, 85, 86, 87, 129, 185, 186, 189, 191, 194 



Center of origin. (See Origins.) 



Cephalic plates 8 



Characters used in systematic 



work 4, 7, 15, 40, 41 



Chilopoma 9, 120 



Chin shields__J 9, 15, 38 



Chrysocephala 164, 165 



Clark, H. L 89 



Page. 

 Clements, F. E., and Pound, U. 

 (/See Pound and Clements.) 



Coition 13 



Cole, L. J 98 



Collaris 158, 159, 163, 184 



Color {sec also Description of 



each form) 7,10,37 



Coluber 8, 148, 158, 176 



Concinnus 5, 6, 



34, 36, 38, 41, 42, 44, 171, 173, 186, 191 

 Convergence. (See Parallelism.) 



Cooper, J. G 173 



Cooper! '. 147 



Cope, E. D 1,4,5,6,35,45, 49, 



54, 56, 61, 63, 66, 80, 85, 86, 87, 88, 94, 

 98, 121, 124, 130, 131, 138, 144, 145, 162, 

 164, 165, 166, 171, 172, 176, 185, 190 



Couchi 133, 145 



Coues.E 46. 47, 72, 75, 78, 85. 138, 142 



Coues, E., and Yarrow, II. C_ 37, 74, 85, 146 



Cox, P 181 



Cyclides 158, 164 



Cyrtopsis 132, 158 



D. 



187 



Darwin, C 



Definite variation (see also Ortho- 

 genesis) 5, 23, 193 



Development, parallel. (See Paral- 

 lelism.) 

 Diagrams. (See Statistical meth- 

 ods.) 

 Distribution (see also Description 



of each form) _ 12, 42, 187, 189, 191, 192 



Ditmars, R. L 90. 99, 108, 112, 179 



Divisions. (See Primary divisions.) 



Dorsalis 158, 159. 166. 168, 172 



Dorsal scale rows (sec also Descrip- 

 tion of each form) 4, 



9. 15. 16, 36, 37, 40, 41 

 Dorsal .stripe (.see also Description 



of each form) 11, 33 



Dwarfing 20, 21, 



28, 31, 32, 37, 84, 97, 119, 120, 129, 

 152, 157, 158, 188, 191, 193, 194, 195 



K. 



Elegans 4, 8, 9, 12, 



17. 24, 31, 34, 36, 41. 42, 43, 58. 61, 62, 66, 

 67. 68, 74, 86, 120, 130, 135. 137, 138, 147, 

 148, 149, 150, 152, 155, 156, 157, lo8, 195 



199 



